or, for destroying, or as terry anderson said in his session, invoking the idea of the tragedy of the commons is a thing we might want to come back to. >> i would like to thank my colleagues for that really great set up. the tragedy of the commons is exactly the idea was going to pick up on. the tragedy of the commons is an idea an ecologist came up with in the 1960s. what he said was essentially that -- and he used the idea of an english comments. he said "if you have a village surrounded by grazing commons, access to the comments, and everyone can put a single cow there, it is a system."le there's not too much destruction visited upon the commons. inlong as everyone operates the common good, then it works very well. it is very stable and sustainable. but the trouble comes, the tragedy as he called it, comes when an individual says if i add just one more cow to the commons, that won't degrade the commons, but it will substantially increase my own wealth and success. and that is true. as long as he is the only one who does that, there is no discernible difference. but when everyone ac